widely panned for a listless debate performance president obama tried to get his groove back a little bit on the campaign trail in denver and in madison, wisconsin yesterday with some on the way homer comebacks if you will, a day late. the president almost had to be prodded to rebut romney's defense on his tax plan wednesday night. yesterday he went right after romney. >> do you challenge what the governor just said about his own plan? >> well, for 18 months he's been running on this tax plan. and now five weeks before the election he is saying that his big, bold idea is never mind. when i got on the stage, i met this very spirited fellow who claimed to be mitt romney. the real mitt romney has been running around the country for the last year promising $5 trillion in tax cuts that favor the wealthy and yet the fellow on the stage last night who looked like mitt romney said he didn't know anything about that. >> and though the president's face did some talking on wednesday night when romney unveiled this line, in fact, watch the president's facial expression in the split screen. i'm su